Home
Class 11
BIOLOGY
Water potential of a flaccid cell will b...

Water potential of a flaccid cell will be

A

`Psi_(w)=(psi_(p))`

B

`Psi_(w)=Psi_(s)`

C

`Psi_(s)=Psi_(rho)`

D

`Psi_(w)=0`

Text Solution

Verified by Experts

The correct Answer is:
B
If plant cell happens to be bathed in hypertonic solution, it loses water through the process of exosmosis. The loss of wate is first from cytoplasm and then central vacuole. As a result, the protoplast is reduced in size. This decreases turgor pressure or pressure potential `(psi_(p))` and corresponding wall pressure. solute potentail becomes slightly more negative due to loss of water. The cell attains a minimum size when turgor pressure is zero/pressure potential `(psi_(p))` is zero.
Therefore, `psi_(w) = psi_(s) + psi_(p)`
or `psi_(w) = psi_(s) (as psi_(p) = 0)`
A cell which is deficient in turgor is called flaccid.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • THE LIVING WORLD

    NCERT FINGERTIPS|Exercise The Living World|130 Videos

Similar Questions

Explore conceptually related problems

In a flaccid cell

" What would be "Psi_(P)" (pressure potential) of a flaccid cell "

Knowledge Check

  • In a flaccid cell

    A
    DPD=OP
    B
    DPD=TP
    C
    TP=OP
    D
    OP=O

  • Water potential is -

    A
    Equal to solute potential
    B
    Equal to pressure potential
    C
    Equal to O.P.
    D
    A tendency of a solution to take up water from another solution across a membrane.

  • Correct expression for water potential of plasmolysed cell will be

    A
    `Psi_(W)=Psi_(S)`
    B
    `Psi_(S)=Psi_(W)`
    C
    `Psi-(W)=0`
    D
    `Psi_(W)=Psi_(S)+(Psi_(P))`

    • Similar Questions

    Explore conceptually related problems

    Water potential of a cell is affected by solute potential only .

    Water potential of a cell is lowered by the -

    Water potential of guard cells during the opening of stomata is

    Water potential of a cell when it is placed in hypertonic solution :

    Assertion :- Water potential of a cell is affected by both solute and pressure potential. Reason:- Addition of solute and water both leads to increase in free energy of solution.

    Home
    Profile